Jack



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Patented Oct. 27, 1925.

UNITED STATES PATENT OFFICE.

JOHN E. GILCHR-IST, DECEASED, LATE 0F SOUTH BEND, WASHINGTON: BY CHARLES A. WERLEY, OF SOUTH BEND. WASHINGTON. EXECUTOR.

JACK.

Application tiled July 1, 1925.

T0 zt/if whom t may come/v2.'

Be it known that JOHN E. Gliemns'r. deceased, 't'ormerliY a citizen of the 'tnited States, residing at South Bend. in the coufr ty ol" Pacilic and State ot' Yi shington. did invent a new and useful Jack, of which the following is a specification.

This invention relates to liftinr` jacks.` and aims to provide novel means whereby the lifting bar will be held in engagement with the lifting pinion cooperating' therewith at all times. thereby insuring' against lost motion, incident to the wearing of the teeth of the lifting bar or pinion.

Another important object of the inven tion is to provide a removable member which may be readily inserted within the body portion to move the lifting bar laterally.

A still further object of the invention is to construct the frame of the body portion in such a way as to increase the length of throw of the lever employed for rotating' the pinion to operate the lifting bar.

Vith the foregoing and other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing' from the spirit of the invention.

Referring' to the drawing' z- Figure 1 is a longitudinal sectional view through a jack constructed in accordance with the invention.

Figure 2 is a rear elevational view thereof. the lever being broken away.

Figure 2l is a transverse sectional view through the front portion of the jack taken on line 3 3 of Figure 1.

Figure 1 is a fragmental sectional view on line 11H-1 of Figure il.

Referring' to the drawing' in detail. the reference character 5 indicates the bod)v portion of the jack which includes a base G on which the jack is supported.

The body portion is hollow and includes a pair of sections held together buv means` of the cap positioned over the upper ends Serial No. 40,897.

of the sections and the bolts 8 that pass into the base 6, as shown bjv Figure 1.

The body portion also includes an enlarged portion t) providing a housing' for the shaft 1t), pinion 11 and ratchet wheel l2, which pinion and ratchet wheel are mounted on the shaft 1() to rotate thercwith.

Pivotallv supported within the honi-1h is a pawl indicated at 13 that cooperates with the ratchet wheel 12. the same being' held in position b v means of the spring member 14, so that as the pinion 11 is moved to operate the lifting' bar, to be hereinafter more fully described, the ratchet wheel 12 together with the pawl 12S will operate to lock the lifting bar against movement.

The lifting bar is indicated at 15 and is provided with teeth 16 that are engaged by the pinion 11 to lift the bar. Disposed between one wall of the housing' t) and thc outer edge of the lift bar 15 is a removable plate 16 provided with an outwardlvv extended upper flange 1T designed to rest over the upper portion of the housing i) to support the plate in an elevated position. The lower end of the plate is provided with a flange 18 that engages the inner surface of the front wall of the housing' to hold the plate normallvv in spaced rela tion with the housing'.

The space between the plate 1G and wall of the housing, is eapeciallv adapted for the reception of a shim or spacing' plate such as indicated at 22 adapted to be positioned to move the plate y1G into close engagement with the `forward edge of the lifting bar 15 so that lost motion due to wear between the teeth of the pinion 11 and teeth 1G of the lifting bar will be obviatcd. and the bar 15 moved into close engagement with the pinion 11.

The reference character 1t) indicates the operating' lever which is supported on the shaft 1() to rotate the ratchet wheel 1'.) which in turn transmits movement to the shaft 10 and pinion 11 carried therelrv. .l latch member indicated at 2t) is carried by the lever 19 and operates a suitable pawl mechanism that engages the ratchet wheel 1Q and transmits movement of the lever 1t) to the ratchet wheel.

As shown, the lower portion of the honer ing 9 is eut away to allow the lever 19 to move to a position in close proximity to the body portion, thereby greatly increasing the length of the stroke ot the lever.

The lower end of the lifting bar 15 extends outwardly providing a lifting arm 2l which may be positioned under an article to be lifted when it is desired to elevate devil-es disposed in close proximity to the ground surface or surface on whieh the jael: is being used.

lVhen the jack becomes worn and loi-,t motion ooours between the lifting' bar 15 and the pinion 1l, the cap 7 is lifted from its position shown by Figure l and a shim or spring plate such as indieated at positioned between the plate 1G and inner surface ot the housing 9 to move the plate iti into engagement with the lifting bar l5. lt is obvious that the eine of shim may be regulated areording to the space between the lifting bar and plate lo caused by wear.

I elai1n:-

l. A lifting jack comprising a body portion a housing forming a part of the body portion, a lifting bar movable through the body portion and having teeth 'formed along one ot' its edges, a pinion meshing with the teeth of 'the lifting bar, means toi' operating the pinion to move the lifting bar vertically, a bearing plate supported within the housing and contacting with the lifting bar, and removable means positioned between the bearing plate and body portion for moving the bearing plate into engagement with the lifting bar.

2. A lifting jack comprising` a body portion, a housing forming a part ot the body portion, a vertically movable lifting bar, operating through the housing, means tor operating the lifting bar, a bearing plate supported within the housing and Contact ing with the vertically movable litting bar. and a shim positioned between the bearing plate and housing to move the bearing plate into close engagement with the vertirally movable lifting bar.

3. A li tting jack Comprising a body portion, a housing forming a part ot the body portion, a vertically movable lifting bar operating through the body portion, said lifting bar having te/eth, a pinion cooperating with the teeth to move the lifting bar vertically, a bearing plate having flanges formed at its ends., and a spring plate adapted to be positioned between the flanges to move the bearing plate into engggagement with the lifting bar.

l. A lifting jack eoinprising a body portion, a housing forming a part ot the body portion, a lifting bar movable through the body portion, a bearing plate having flanges formed at its ends, one of said flanges adapted to engage the inner surface ot the housing to hold the bearing plate in spaced relation with the housing, and a shim adapted to be positioned between the bearing plate and housing to move the bearing.;` plate into close engagen'ient with the vertieally movable member.

CHARLES A. 7WERLE Y, [L'weeuto' of the Last VW/ rml Testa/neuf of Jo/m E. Gilchrist. 

